Home / 28,469,674.80-42,704,512.20-20,855,415.60

Finding the Fourth Proportional to 28,469,674.80, 42,704,512.20 and 20,855,415.60

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Solution

The fourth proportional to 28,469,674.80, 42,704,512.20 and 20,855,415.60 is: 31,283,123.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,469,674.80 : 42,704,512.20 = 20,855,415.60 : x
  2. Step 2: Convert to fraction form
    28,469,674.80/42,704,512.20 = 20,855,415.60/x
  3. Step 3: Cross multiply
    28,469,674.80x = 42,704,512.20 × 20,855,415.60
  4. Step 4: Simplify right side
    28,469,674.80x = 890,620,349,926,270.50
  5. Step 5: Solve for x
    x = 890,620,349,926,270.50/28,469,674.80
  6. Step 6: Final answer
    x = 31,283,123.40

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.